<p><p><figure id='attachment_3560' style='max-width:1384px' class='caption aligncenter'><img class="wp-image-3560 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Photograph showing a tamper performing the Rapid impact compaction (RIC) technique." width="1384" height="966" /><figcaption class='caption-text'> Rapid impact compaction (RIC) technique. (Serridge and Synac, 2006)</figcaption></figure></p><p><div><h2>Project Summary/Scope:</h2>The project consisted of the construction of a 400,000 ft² parking lot for semi-trucks within a zone of random fill.</p><p>Subsurface Conditions: The foundation soils consisted of essentially granular materials comprising sand, gravel, ash, foundry waste, and demolition rubble placed in an uncontrolled manner.</p><p>The design of the pavement system required a post Rapid Impact Compaction (RIC) treatment CBR of 20%, prior to constructing the surfacing/hardstanding. Construction employed two main treatment passes (on offset grids) with between 20 and 30 blows at each compaction point.<br><h2>Performance Monitoring:</h2>Compaction trials/checks and plate load tests were used to verify the efficiency of the treatment technique during and after its execution, respectively.</p><p><figure id='attachment_3562' style='max-width:1112px' class='caption aligncenter'><img class="wp-image-3562 size-full" src="https://www.geoinstitute.org/sites/default/files/geotech-tools-uploads/…; alt="Photograph of rapid impact loading plate showing a seven ton hammer dropping on a circular steel compaction foot." width="1112" height="727" /><figcaption class='caption-text'> RIC imprints produced by repeated blows of 7 tonne piling hammer on circular steel compaction foot, which remains in contact with the ground. (Serridge and Synac, 2006)</figcaption></figure><h2>Project Technical Paper:</h2>Serridge, C.J. and Synac, O. (2006). “Application of the Rapid Impact Compaction (RIC) technique for risk mitigation in problematic soils.” Proceedings of IAEG2006, London, Paper No. 294. The Geological Society of London.<br><h2>Date Case History Prepared:</h2>November 2012</p><p>&nbsp;</p><p></div></p></p>